#include<stdio.h>
void fun(void *p);
int i;
int main()
{
    void *vptr;
    vptr = &i;
    fun(vptr);
    return 0;
}
void fun(void *p)
{
    int **q;
    q = (int**)&p;
    printf("%d\n", **q);
}

#include<stdio.h>
int main()
{
    char *str;
    str = "%s";
    printf(str, "K\n");
    return 0;
}

#include<stdio.h>
int *check(static int, static int);
int main()
{
    int *c;
    c = check(10, 20);
    printf("%d\n", c);
    return 0;
}
int *check(static int i, static int j)
{
    int *p, *q;
    p = &i;
    q = &j;
    if(i >= 45)
        return (p);
    else
        return (q);
}

#include<stdio.h>
int main()
{
    printf("%d, %d\n", sizeof(NULL), sizeof(""));
    return 0;
}

#include<stdio.h>
int main()
{
    void *vp;
    char ch=74, *cp="JACK";
    int j=65;
    vp=&ch;
    printf("%c", *(char*)vp);
    vp=&j;
    printf("%c", *(int*)vp);
    vp=cp;
    printf("%s", (char*)vp+2);
    return 0;
}